The rarity of The Igneous Stone is Rare, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
The Igneous Stone is a skin for Tiny. The skin was added to the game on December 9, 2014, it was created by katzeimsack.
The Igneous Stone is currently one of the most popular skins, but it is rarely seen in the game due to its high price.